Impedance Magnitude Difference Answered
I am simulating a piezoelectric disc made from Ferroperm PZ26. I have measured the impedance magnitude of 5 of these PZ26 discs using an impedance analyzer and I am trying to get the simulated impedance magnitude to match closely to this measured impedance. I am using the radial mode of the disc and therefore looking at frequencies around 100 kHz.
The problem I am having is that the experimental measurement has a much greater impedance magnitude than the simulated impedance. I have attached a plot which shows this.
I believe it could be something to do with the Q factor used when defining the PZ26 material. However, I have tried increasing the Q factor and, while the impedance magnitude does increase a little, there is still a very big difference in the impedance magnitude.
I am hoping someone will be able to advise me on what steps I can take to try and correct this problem?
Thanks for your time,